The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2023
Filed:
Nov. 10, 2020
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Koki Takasawa, Suwa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/00 (2006.01); G04B 37/22 (2006.01); G04B 19/12 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/42 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01);
U.S. Cl.
CPC ...
G04B 37/22 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); G04B 19/12 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01);
Abstract
A watch component includes an austenized ferritic stainless steel, the austenized ferritic stainless steel including a first layer including a ferrite phase, and a second layer including an austenized phase formed of a nitrogen solid solution of the ferrite phase. An average particle size of ferrite crystal grains constituting the ferrite phase is 300 μm or greater, and an average particle size of austenitic crystal grains constituting the austenized phase is 150 μm or smaller.